3989556 has 18 divisors (see below), whose sum is σ = 10084802. Its totient is φ = 1329840.

The previous prime is 3989533. The next prime is 3989569. The reversal of 3989556 is 6559893.

3989556 is a `hidden beast` number, since 3 + 98 + 9 + 556 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2340900 + 1648656 = 1530^2 + 1284^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 55375 + ... + 55446.

Almost surely, 2^3989556 is an apocalyptic number.

3989556 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

3989556 is an abundant number, since it is smaller than the sum of its proper divisors (6095246).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3989556 is a wasteful number, since it uses less digits than its factorization.

3989556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110831 (or 110826 counting only the distinct ones).

The product of its digits is 291600, while the sum is 45.

The square root of 3989556 is about 1997.3872934411. The cubic root of 3989556 is about 158.6018279747.

The spelling of 3989556 in words is "three million, nine hundred eighty-nine thousand, five hundred fifty-six".